Structure of check-valve and production method thereof and...

Details Structure of check-valve and production method thereof and... Structure of check-valve and production method thereof and...

2007-04-17

2007-04-17

Maust, Timothy L. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

With manipulation of flexible or collapsible receiver or supply

C141S010000, C141S313000, C141S317000, C053S467000, C053S469000

Reexamination Certificate

active

10854656

ABSTRACT:
A check valve for use in an air-packing device has a simple structure and promotes to easily inflate all of the air cells of the air-packing device with a relatively lower pressure. The check valves can be easily attached to any locations of the air-packing device. The check valves are formed when a check valve film is attached to one of the first and second thermoplastic films. Peeling agents of predetermined pattern are applied on the check valve film which prevents heat-sealing between the first and second thermoplastic films for air tightly separating two adjacent air containers. The check valve is configured by an air flow maze portion having a zig-zag air passage and a common air duct portion which provides the air to the air flow maze portion of a current air container as well as to the air flow maze portion of a next air container.

REFERENCES:
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patent: 5826723 (1998-10-01), Jaszai
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patent: 6722502 (2004-04-01), Newman
patent: 7000767 (2006-02-01), Tanaka et al.

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